Consider logging classcast exceptions caused by lambdas at trace level

[philwebb]

See spring-projects/spring-boot#16631 for background.

Currently lambda based listeners get debug logging if they don't accept the argument type. For example:

java.lang.ClassCastException: class org.springframework.boot.context.event.ApplicationReadyEvent cannot be cast to class org.springframework.boot.devtools.classpath.ClassPathChangedEvent (org.springframework.boot.context.event.ApplicationReadyEvent and org.springframework.boot.devtools.classpath.ClassPathChangedEvent are in unnamed module of loader 'app')
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)

I wonder if trace level logging might be more appropriate.